Feed device for nut-machines.



L. H. BRlGHTMAN.

FZED DEVICE FOR NUT' MACHINES.

APPLICATlQN FILED SEPT. 29, I915- Patenoed Nov. 20, 1917.

Unrrnn srarns rnrniv'r orrion LATHAM H. BRren'rr/mir, onooLUMB'Us, 01110.

FEED DEVICE FOR NUT-MACHINES. 1

' Specification of netters'latent. Patfited'NovlZO, 1917.

Application filed September 20,1915. Serial No. 51,564.

T 0 all whom it may concern:

Be it known that I, Ln'rrianrH. Bnrerrr- MAN, a citizen of the United States, residing at Columbus, in the county of Frankl n and State of Ohio, have invented certain new and useful Improvements in Feed DevVices for Nut-Machines, of which the following is a specification. 1

The present invention is associated with the art of making nuts, and has particular bearing to machines for feeding the stock bar into the nut making machine; My invention is particularly applicable to those types of machines in which the nuts are made from the stock in its cold condition as opposed to hot pressed nuts. I

The main object of my invention resides in the provision of a structure for gripping the stock bar in such manner that no score marks of any kind are left on the same to mar the appearance of the nuts and to further grip this stock bar in a positive manner so that play is impossible.

A further object of my invention resides in the provision of an eccentrically mounted gripping wheel structure, the gripping wheel being so constructed that its larger portion or crest is caused to move into gripping or holding contact with the stock bar faces. v

A further object of my invention resides in a spring structure for normallyvgoverning the gripping wheel so that the stock bar is gripped to prevent movement 111 one direction and is free to move inthe other direction. In this connection, my invention also has for its object the provision of adjusting means for varying the tension of this spring structure.

The preferred embodiment of my inven-.

tion is shown in the accompanying sheet of drawings, in which similar characters of reference designate corresponding parts, and in which:

Figure l is a view in side elevation of my feed mechanism, and, I

Fig. 2 is a front elevation of the structure shown in Fig. 1, looking from the right of the sheet, a portion of which is also shown in section.

In these drawings, the supporting framework is designated generally by the reference numeral 1, and comprises a pair of sleeves 2 slidably mounted upon guide rails 3. This supporting framework is further provided with a cap 4 and is formed to rotatably receive a feed head 5. Thisfeed head is formed with a longitudinally extending hollowed out portion (3,- through which the stock bar is adapted to pass and is prevented from longitudinal movement Within the framework by I means ofv the. shoulders presented at 7 and 8. The for- Hward end of this feed head is shaped to present side pieces 9 to supportbearings 10 and 11 at its upper and lower ends respectively. All of these bearing portions are bored to receive bushings 11 and these bushings are in turn bored to rotatably receive the spindles 12. Upon each of these splndles there is mounted a gripping wheel 7 such as is shown at 1.3-and an inspection of Fig.1 will show that each of these gripping wheels is eccentrically mounted on ts respectlve spindle in the sense that its center of rotation is not in thecenter of the wheel. 7

I have also provided spring means for normally tending to rotate these, gripping wheels so that their larger portions will lie opposite each other and this spring means is vshown in the form of a plurality of torsion springs 14, one end of each spring bewhich they are applicable. F urther, Iw'i'sh 1t understood that the particularishape of.

the gripping Wheel faces is not of vital importance. Each of the gripping wheels-is also provided with a series of radially'arranged holes 18 into which a suitable tool may be inserted to turn them to permit the insertion of a piece of stock and immediately upon their release, the springs 14 act to bring them into wedging engagement with the stock bar faces. In order to regulate the tension of these torsion springs, the opposite sides of the protruding ends of each of the bushings 11 are flattened as is shown at 19 and, therefore, by the application of a wrench, these bushings may be rotated to increase or decrease the tension of the springs as desired and the bushings then in turn held permanently in position by tightening of the set screws 20.

The manner of operating my device is as follows The gripping wheels 13 are turned 7 in a direction to'present the maximum distance between their faces and this gripping may be effected by hand or by the use of suitable tools inserted in the radially arranged holes 18; After, the stock bar is in position hetweenthe gripping wheels, these wheels are released and the tensionof the springs 14 is such as to cause their rotation l into engagement with the stock bar faces. As shown in Fig. 1, movement of the entire to move the larger portions of the wheels framework toward the right, which may be efiected'by a pull upon the link 21,- pivoted 15 "will cause a movement of the entire stock -'bar in a forward direction since any rotative to. the general framework as shown at 22,

tendency of the gripping whecls'will only 'move them into firmer engagement with the stock bar. Return movement or movement toward the left of the general framework is possible, however, since movement in this apparent that I have'provided a type of gripping means wherein all score marks impressed in the stock bar faces is eliminated and at the same time a positive grip is attained. Further, by means of these eccentrically mounted wheels, bars varying in size may also be operated upon.

What I claim, is:

1. A feed device of the character described comprising a feed head rotatably mounted to rotate with the stock bar as a center and supported to be capable of longitudinal re- Copics 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

torotate continuously in the same direc tion with the stock bar asa center and supported to be capable of longitudinal reciprocatory movement, a pair of eccentrically mounted wheels carried by said head between which the stock bar is adapted to pass so that longitudinal movement of the head in one direction will wedge the stock bar between said rollers, torsion springs cooperating'with said wheels in amanner to normally urge the larger portions of said wheels toward the stock bar, a means whereby the tension of-said springs may be varied.

3. A feed device of the character described comprising a feed head rotatably mounted "to rotate with the stock bar as a center and supported to be capable of longitudinal reciprocatory movement, a pair of transverse spindles in said head, an eccentrically bored gripping wheel for each spindle, a bushing in which one end of each spindle is mounted, a torsion spring encircling each spindle and engaging its respective wheel at one end and bushing at its other end, and means whereby said bushing may be held in any position of rotative adjustment.

In testimony whereof I aliix my signature in presence of two witnesses.

LATHAM H. BRIGHTMAN;

Witnesses:

\VALTER E. L. Boon, A. L. PHELPS.

Washington, D. C. t. 

